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How to Block Stingray Devices

Disable 2G On Android To Block Stingray Devices 1) Pull up the phone dialer and dial *#*#4636#*#* (that spells INFO) 2) This brings you to the testing screen, select "Phone/Device information". 3) Scroll down a little to "preferred network type", select the arrow. 4) Change it to LTE/WCDMA Only. It…